looking for Automatic Airvent (Help and advise )
looking for Automatic Airvent (Help and advise )
(OP)
am looking for an Automatic Air Vent Valve to be used with Gear Pumps to clear an air lock while the pump is priming. Please advise if you have a suitable product?
Operating Pressure - Max 10 Barg
SG - 0.92
Viscosity - 30000 cp
Pumping Temperature - 100 deg C (Maximum)
Operating Pressure - Max 10 Barg
SG - 0.92
Viscosity - 30000 cp
Pumping Temperature - 100 deg C (Maximum)





RE: looking for Automatic Airvent (Help and advise )
http://www.watts.com/pages/_products_details.asp?p...
or
http://www.spiraxsarco.com/pdfs/sb/s31_06.pdf
or
https://www.google.com/search?q=automatic+air+vent...
the last one is real good
prognosis: Lead or Lag
RE: looking for Automatic Airvent (Help and advise )
RE: looking for Automatic Airvent (Help and advise )
RE: looking for Automatic Airvent (Help and advise )
Not sure about the 100 deg C operation but you could always ask.
DOL
RE: looking for Automatic Airvent (Help and advise )
RE: looking for Automatic Airvent (Help and advise )
RE: looking for Automatic Airvent (Help and advise )
RE: looking for Automatic Airvent (Help and advise )
Can u elaborate how you install the airvent manual, i m not too sure the application of auto vs manual
RE: looking for Automatic Airvent (Help and advise )
RE: looking for Automatic Airvent (Help and advise )
RE: looking for Automatic Airvent (Help and advise )
Is actually need NPSHr 1.5
M. I think you are right there is cavitation as the sucking tank is probably not in high elevation. My q is
shoould i increase the elevation of the tank so there is enough NPSHa
What is the purpose for the screw extruder,will it bring down the viscosity ?
When we could use aivent ?
RE: looking for Automatic Airvent (Help and advise )
The NPSHr 0f 1.5 M for the pump is based on pumping what liquid / viscosity?
The NPSHr will increase with the liquid viscosity even at same flow rate.
With liquid of 30,000cP , you will not hear any noise even if the pump is cavitating.
I don't think the polymer at 100C you mentioned is the same type of polymer Compositepro,is referring to.
The gear pump /extruder combination mentioned in his post is for the plastic industries typically by MAAG pump which act as a booster for the extruder.
RE: looking for Automatic Airvent (Help and advise )
The NPSHr 1.5 is for 30,000 cps . It designed
At this rated flow. However the issue is the flow . Anyway i could check the cavitation occurs ?
How to improve the flows
RE: looking for Automatic Airvent (Help and advise )
Differential Pmin is too high at 3 bar. I need to close valve at dp minimum of 0.5 bar, Because the pump currently experiences a differential pressure of approximately 2 bar. So this valve will not close if it requires dp min of 3 bar.
Here is the airvent they offer
https://www.dropbox.com/s/7egea3mga8w5luy/Hydacusa...
RE: looking for Automatic Airvent (Help and advise )
RE: looking for Automatic Airvent (Help and advise )
RE: looking for Automatic Airvent (Help and advise )
RE: looking for Automatic Airvent (Help and advise )
It basicly sucking from a closed tank and there is a heat exchanger that solidify the polymer solution . Probably there is cavitation on the suction as mentioned by forumer. Would that be possible to have auto vent airvent valve
RE: looking for Automatic Airvent (Help and advise )
Did this system _ever_ work?
Mike Halloran
Pembroke Pines, FL, USA